Commits on Apr 15, 2023

1. JIT: enable one particular flow opt when we have PGO …

   This particular optimization seems to be a good idea, so not sure why
   the code was unwilling to do it if we had profile data.
   
   This optimization removes a "branch around":
   
   ``
   BlockA: jtrue (p) BlockC
   BlockB: {empty} jmp BlockD
   BlockC: ...
   ...
   BlockD: ...
   ```
   becomes
   
   ```
   BlockA: jtrue (!p) BlockD
   BlockC: ...
   ...
   BlockD: ...
   ```
   
   If later during code layout we decide we'd rather have
   ```
   BlockA: jtrue (p) BlockC
   BlockD: ...
   ...
   BlockC: ...
   ```
   we can still make that happen.

   

   AndyAyersMS committed Apr 15, 2023
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